Pontiac FIREBIRD 1972 Service Manual page 22

SECTION 1
HEATING AND VENTILATION
CONTENTS OF THIS SECTION
Diagnosis
....................................................................
1
-
1
Heater Wiring Schematic
......................................
1-1
Heater Trouble Diagnosis
......................................
1-2
General Description
..................................................
1-4
Air Distribution
....................................................
1-5
Control Panel
........................................................
1-6
Temperature Control
........................................
1-7
Ventilation
..............................................................
1-7
Heater Functional Test
..........................................
1-8
Service Procedures
....................................................
1-9
Heater Cable Adjustment
......................................
1-9
Heater Cable Replacement
..................................
1
-
15
Heater Control Panel
..........................................
1- 16
Fan Switch
..........................................................
Blower Motor Resistor
.......................................
Heater Wire Harness
..........................................
..................................................
Defroster Nozzle
Heater Outlet Duct
..............................................
G Series Vacuum Components
..........................
Blower Motor and Impeller
................................
Heater Hoses
........................................................
Heater Core
..........................................................
..........................................................
Heater Case
Lower Ventilators
................................................
Upper Ventilation
................................................
DIAGNOSIS
HEATER SYSTEM WIRING SCHEMATICS
F Series. These schematics should be referred to for diag-
-
ALL
nosis of electrical problems in the heater system. The X
Series heater wiring is part of the instrument panel wiring
The heater system wiring schematic in Fig. 1-1 applies to
harness.
B Series. The schematic in Fig. 1-2 applies to A, G and
CONTROL PANEL
a
y
MED
BLACK
1.97 OHMS
b
LO
-----
BROWN
L
RESISTOR
BLOCK
BROWN
BLOWER
MOTOR IGN. SWITCH
DIAL LIGHT
ORqNGE
FUSE BLOCK
1 1
f 2 F ? 2 $ y & J
25 AMPFUSE
' r x p
DARK
O R r
EN
HEADLIGHT
SWITCH
I
Fig. 1-1 Heater Wiring Schematic
-
B Series